Venturi with adjustable throat pipe distance

Abstract

The utility model discloses a venturi with an adjustable throat pipe distance, which relates to the technical field of venturi, and comprises a venturi main body and a nozzle, the venturi main body comprises a vortex cavity, a contraction section and a throat pipe which are communicated with one another, one end of the vortex cavity is provided with an internal thread, the nozzle is provided with an external thread matched with the internal thread, and the throat pipe is connected with the venturi main body. The Venturi main body is in threaded connection with the nozzle; a feeding hole communicated with the vortex cavity is also formed in the side wall of the venturi main body, and is positioned between the internal thread and the contraction section; the nozzle comprises an insertion part and an external connection part, the external thread is arranged at the end, close to the external connection part 22, of the insertion part, and a sealing ring used for preventing media from leaking is further arranged on the insertion part; the external connection part is used for being connected with external equipment; according to the design, the throat pipe distance can be adjusted, and sealing performance and abrasion resistance are good.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of venturi, specifically relates to a throat pipe distance adjustable venturi. BACKGROUND

[0002] With the acceleration of the intelligent process of factory, the powder industry is concentrating on the construction of unattended system, online detection technology and intelligent integrated management system. Under this background, the detection of powder particle size distribution and element analysis has become the standard configuration of many factories, and its popularity speed is increasing; the importance of online detection link is increasingly prominent, because the accuracy of the detection result is highly dependent on whether the sample is fully representative; once the sample lacks representativeness, the detection data may deviate from the true situation, and then cause misjudgment or mislead decision, which constitutes potential risk to production process and product quality.

[0003] The sample is affected by a series of factors such as temperature, flow rate, flow, pressure, humidity, viscosity and the like in the process pipeline; these factors can cause the venturi to be unevenly dispersed, which can easily block the venturi, cause uneven mixing of products, powder caking, excessive fine powder and other problems, and then affect the accuracy of instrument detection. At present, the venturis on the market are mostly non-adjustable, and cannot adjust the appropriate vortex gas according to the pressure, flow rate, flow, humidity, viscosity and other parameters in the process pipeline.

[0004] In order to ensure that the representative sample can be taken, and can be fully dispersed, improve the accuracy of instrument detection such as powder particle size analysis and element analysis, reduce the error caused by the sample, reduce the frequency of field maintenance, save the time of maintenance personnel, a venturi capable of adjusting the appropriate vortex gas according to the pressure, flow rate, flow, humidity, viscosity and other parameters in the process pipeline is needed to ensure that representative samples can be taken under various process conditions. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a throat pipe distance adjustable venturi, which can solve the problem that the existing venturi cannot adjust the appropriate vortex gas according to the parameter conditions in the process pipeline, resulting in uneven sample dispersion and inability to obtain representative samples.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a throat distance adjustable venturi, including venturi main part and nozzle, the venturi main part includes the vortex chamber, the converging section and the throat that intercommunication, the vortex chamber one end is provided with internal thread, be provided with the external thread of matching with the internal thread on the nozzle, and the venturi main part is connected with the nozzle thread, the side wall of venturi main part is provided with the feed port with the vortex chamber communication still, the feed port is located between the internal thread with the converging section, the nozzle includes the insertion part and the external connection, the external thread sets up in the insertion part near the one end of external connection, the insertion part is provided with the sealing ring still for preventing medium to leak, the external connection is used for connecting external equipment.

[0008] Optionally, the inner diameter of the vortex chamber is slightly larger than the outer diameter of the insertion part.

[0009] Optionally, the inner wall of the vortex chamber is made of ceramic material.

[0010] Optionally, the converging section is conical, the inner diameter of the converging section decreases from large to small, the end with large inner diameter is connected with the vortex chamber, and the end with small inner diameter is connected with the throat.

[0011] Optionally, the throat is cylindrical.

[0012] Optionally, the end of the throat is provided with a connecting piece, and the connecting piece is used for connecting external diffusion device.

[0013] Optionally, the end of the insertion part away from the external connection is provided with a nozzle part, and the nozzle part is conical.

[0014] Optionally, the sealing ring is located between the external thread and the nozzle part.

[0015] Beneficial effects: the throat distance adjustable venturi has the following advantages:

[0016] (1) through the threaded connection between the venturi main body and the nozzle, the distance between the nozzle nozzle part and the throat can be adjusted, that is, the throat distance is adjustable, so that the venturi can adjust the appropriate vortex gas according to the parameter conditions in the process pipeline, make the sample dispersed uniformly, obtain a representative sample, and improve the accuracy of instrument detection such as powder particle size analysis and element analysis;

[0017] (2) through the setting of the sealing ring, the medium in the vortex chamber is prevented from leaking, and the stability and reliability of the device are ensured.

[0018] (3) through the setting of the ceramic lining, the wear resistance of the device is significantly improved, the service life of the equipment is prolonged, the loss caused by material scouring is effectively reduced, and the stability and reliability of the equipment are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 Fig. 1 is a schematic diagram of the overall structure of a Venturi with an adjustable throat distance in an embodiment;

[0020] Fig. 2 Fig. 2 is a schematic diagram of the overall structure of a Venturi main body in an embodiment;

[0021] Fig. 3 Fig. 3 is a schematic diagram of the overall structure of a nozzle in an embodiment.

[0022] In the figure: 1, Venturi main body; 11, vortex chamber; 12, converging section; 13, throat; 2, nozzle; 21, insertion part; 22, external connection part; 210, external thread; 211, sealing ring; 212, nozzle part; 3, feed inlet; 4, connecting piece. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings structure is only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application.

[0024] In the description of the present application, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0025] In the description of the present application, it should be understood that the use of "first", "second" and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore it cannot be understood as a limitation on the protection scope of the present application.

[0026] EMBODIMENT

[0027] As Figs. 1-3As shown, the embodiment provides a throat distance adjustable Venturi, including a Venturi body 1 and a nozzle 2, the Venturi body 1 includes a vortex chamber 11, a contraction section 12 and a throat 13 which are communicated with each other, the vortex chamber 11 is provided with an internal thread at one end, the nozzle 2 is provided with an external thread 210 which matches the internal thread, the Venturi body 1 is threadedly connected with the nozzle 2; specifically, the vortex chamber 11, the contraction section 12 and the throat 13 are connected in sequence, the internal thread is arranged on the inner wall of one end of the vortex chamber 11, the Venturi body 1 is threadedly connected with the nozzle 2, the other end of the vortex chamber 11 is connected with the contraction section 12; the side wall of the Venturi body 1 is further provided with a feed inlet 3 which is communicated with the vortex chamber 11, the feed inlet 3 is located between the internal thread and the contraction section 12, and the feed inlet 3 is arranged on the side close to the contraction section 12; the nozzle 2 includes an insertion part 21 and an external part 22, the external thread 210 is arranged at one end of the insertion part 21 close to the external part 22, and a sealing ring 211 for preventing medium leakage is further arranged on the insertion part 21; the external part 22 is used for connecting external equipment; specifically, the external thread 210 and the internal thread are arranged with a certain length, when the Venturi body 1 is connected with the nozzle 2, the insertion part 21 on the nozzle 2 is located in the vortex chamber 11 of the Venturi body 1, and the external part 22 on the nozzle 2 is located outside the Venturi body 1; the throat distance is adjusted by the position of the thread connection, so as to adapt to the vortex gas demand under different parameter conditions of the process pipeline, make the sample dispersed uniformly, obtain a representative sample, and improve the accuracy of instrument detection such as powder particle size analysis and element analysis.

[0028] It should be noted that the overall length of the insertion part 21 cannot exceed the length of the vortex chamber 11, so as to prevent the nozzle 2 from extending into the contraction section 12.

[0029] In an optional embodiment, the inner diameter of the vortex chamber 11 is slightly larger than the outer diameter of the insertion part 21; so that the external thread 210 and the internal thread can perfectly match, and after the Venturi body 1 is connected with the nozzle 2, the outer wall of the insertion part 21 does not contact the inner wall of the vortex chamber 11; so that the powder can enter the inside of the vortex chamber 11 through the feed inlet 3, and pass through the contraction section 12 and the throat 13 to enter the connected external equipment.

[0030] In an optional embodiment, the inner wall of the vortex chamber 11 is made of ceramic material; the ceramic material refers to a kind of inorganic non-metallic material which is made of natural or synthetic compounds through shaping and high-temperature sintering, and has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance and the like; through the arrangement of the ceramic lining, the wear resistance of the device is significantly improved, the service life of the equipment is prolonged, the loss caused by material scouring is effectively reduced, and the stability and reliability of the equipment are improved.

[0031] In an alternative embodiment, the converging section 12 is tapered, the inner diameter of the converging section 12 decreases from large to small, the end with large inner diameter is connected with the vortex chamber 11, and the end with small inner diameter is connected with the throat 13; by the tapered setting of the converging section 12, when the gas flow passes through the converging section 12, the Venturi effect is generated, the flow rate increases and the pressure of the fluid decreases with the gradually narrowing channel in the converging section 12, thereby forming negative pressure to suck the powder from the feeding port 3.

[0032] In an alternative embodiment, the throat 13 is cylindrical; the inner diameter of the throat 13 is the same as the minimum inner diameter of the converging section 12, and the throat 13 is connected at the end with small inner diameter of the converging section 12; the channel is the smallest at the throat 13, the flow rate reaches the maximum, and the pressure drops to the minimum.

[0033] In an alternative embodiment, the end of the throat 13 is provided with a connecting piece 4, which is used to connect an external diffusion device; specifically, the internal channel of the diffusion device gradually increases, at which the flow rate slowly decreases and the pressure gradually recovers; the diffusion device is connected with a detection device behind, which is used to detect the obtained powder sample.

[0034] In an alternative embodiment, the mouth 212 of the insertion part 21 away from the outer connection part 22 is provided with a mouth 212, which is tapered; specifically, the outer cross section of the mouth 212 is tapered, and the internal channel is still cylindrical; by the tapered setting of the mouth 212, the nozzle 2 is facilitated to be inserted into the Venturi body 1, and the overall structure of the nozzle 2 is also more beautiful.

[0035] In an alternative embodiment, the sealing ring 211 is located between the outer thread 210 and the mouth 212; when the nozzle 2 is inserted into the Venturi body 1, the outer thread 210 on the nozzle 2 is connected with the internal thread on the Venturi body 1, the sealing ring 211 is located in front of the outer thread 210, and the sealing ring 211 is in interference fit with the inner wall of the vortex chamber 11 to prevent the internal gas flow from flowing out of the gap between the nozzle 2 and the Venturi body 1; which affects the stability and reliability of the device.

[0036] Working principle: the throat distance adjustable Venturi of the embodiment is used, the nozzle 2 is first threadedly connected with the Venturi body 1, during the connection process, the throat distance is adjusted according to the parameter conditions in the process pipeline to obtain appropriate vortex gas; when the gas flow passes through the converging section 12, negative pressure is generated to suck the powder from the feeding port 3, the powder passes through the converging section 12 and the throat 13, enters the diffusion device, and after the pressure is recovered by the diffusion device, enters the detection device for detection.

[0037] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A Venturi with adjustable throat distance, characterized in that: The invention comprises a venturi body (1) and a nozzle (2), wherein the venturi body (1) comprises a vortex chamber (11), a contraction section (12) and a throat (13) which are interconnected, one end of the vortex chamber (11) is provided with an internal thread, the nozzle (2) is provided with an external thread (210) which matches the internal thread, and the venturi body (1) and the nozzle (2) are threadedly connected; a feed port (3) which is connected to the vortex chamber (11) is also provided on the side wall of the venturi body (1), and the feed port (3) is located between the internal thread and the contraction section (12); the nozzle (2) comprises an inserting portion (21) and an external connecting portion (22), the external thread (210) is provided at one end of the inserting portion (21) close to the external connecting portion (22), and a sealing ring (211) for preventing leakage of a medium is also provided on the inserting portion (21); the external connecting portion (22) is used to connect to an external device.

2. The venturi with adjustable throat distance according to claim 1, characterized in that: The inner diameter of the vortex chamber (11) is slightly larger than the outer diameter of the inserting portion (21).

3. The venturi with adjustable throat distance according to claim 1, characterized in that: The inner wall of the vortex chamber (11) is made of ceramic material.

4. The venturi with adjustable throat distance according to claim 1, characterized in that: The contraction section (12) is conical, and the inner diameter of the contraction section (12) decreases from large to small. The end with the large inner diameter is connected to the vortex chamber (11), and the end with the small inner diameter is connected to the throat pipe (13).

5. The venturi with adjustable throat distance according to claim 1, characterized in that: The throat (13) is cylindrical.

6. The venturi with adjustable throat distance according to claim 1, characterized in that: The end of the throat pipe (13) is provided with a connecting piece (4), and the connecting piece (4) is used to connect to an external diffusion device.

7. The venturi with adjustable throat distance according to claim 1, characterized in that: A mouth (212) is provided at one end of the insertion portion (21) away from the external connection portion (22), and the mouth (212) is conical.

8. The venturi with adjustable throat distance according to claim 7, characterized in that: The sealing ring (211) is located between the external thread (210) and the mouth (212).

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